Pattern grading machine



Sept. 25, 1951 A PECHER 2,569,188

PATTERN GRADING MACHINE Filed Jan. 18, 1947 2 Sheets-Sheet 1 p 25, 1951 A. PECHER PATTERN GRADING IVIACIIIIIE 2 Sheets-Sheet 2 Filed Jan. 18, 1947 INVENTOR.

Patented Sept. 25, 1951 Albrecht Pecher, Orebro, Sweden Application January 18, 1947, Serial No. 722,914 In Sweden January 29, 1946 5 Claims.

The invention relates to such machines as are used in the manufacture of shoes when they are intended for manufacturing shoes in series with patterns of a similar kind but of different dimensions. In order to effect these dimension changes when making the patterns two transforming arms resembling pantographs are used, which work in a rectangular co-ordinate system, by means of which mathematically correct enlargements and diminutions can be attained.

The device dillers from known devices for this purpose mainly in such a way that the adjustment for difierent sizes occurs by means of four sliding adjusting rods, two for each adjusting arm. The adjustment is made with respect to scales fixed on the adjusting arms. Thescales are graduated either in millimeters or in stitches or both in combination. The deflexion movement of the arms is directly .proportional to the positions of the rods with respect to their respective arm, which cause the transformations which bring about designs which are exactly equal to or proportional to a master pattern.

The device is shown on the enclosed drawings in an achievement chosen as an example, which may be varied within broad limits without the principle being abandoned. Fig. 1 shows the machine from the side, Fig. 2 shows it from above. Figs. 3 and 4 show parts of Figs. 1 and 2 on a larger scale and with the settable rods of one of the adjusting arm's displaced. Fig. 5 shows a di-' agram, which demonstrates how the adjusting arms are moved.

The base plate i is provided with an upright 2 extending crosswise f the longitudinal direction of the plate I and a similarly .disposed frame 3, which together serve as guides for a carriage 4. The carriage 4 is provided with carryingrollers 52, which run in grooves on the frame 3. The carriage is rigidly connected to a channelled bar 5, which is supported at one end on a roller 6, which rolls on the upright 2. Along the bar a carriage 8 runs on rollers l, which carriage consequently can move parallel with itself and also at right angles to itself when the carriage 4 and the bar 5 are moved on their supporting rollers.

The carriage 8 rigidly supports an arm 9, on which the leading pin 10 is fixed. On the plate I plinths H are arranged, which, by the medium of rollers l2, support and steer a table l3, so that it can move only in the same direction as the longitudinal direction of the carriage 8. The tabl l3 supports, through the medium of plinths l4 and rollers l5, a table H5 in such a way that 2 table I6 can move with respect to the table l3 only at right angles-to the direction of motion of the table 13. The table l6 consequently gets the same directions of motion, in relation to the I foot plate I, as the carriage 8.

of these rods is provided with an adjusting index,

and when making the adjustment these indices are placed opposite to certain scale, graduations on the arm ll. The index on'the rod |'8 is placed opposite to a shoe number and the index on the 'rod i9 opposite to a scale graduation. The rod I8 then indicates what shoe number is tofbe treated, and the rod l9 what diminution or enlargement is wanted. At the side of the indices there are two buttons 20, 2|, by means of which the adjustment of the rods l8 and I9, respec tively, are brought about. The left end of the rod I8 is at point 45 pivoted toa guide '22, which glides over a slide 23, which, by the medium of a cross-piece 24 and arms 215,715 rigidly connected to the carriage 4. The cross-piece 24 forms a right angle with the line A B (Fig. 5), The left end of the rod I9 is pivotally connected by a pin '46, Figs. 4 and 5, to a plate 26 provided with a groove 21, in which a guide bar with a handle 28 arranged on the underneath side of the table It slides, Figs. 1 and 2. The adjusting arm I! is pivoted for movement about the center 0 of the plinth 44 on the table l3. The adjusting arm 29 is preferably tubular like the arm l1 and is provided with two longitudinally movable adjusting rods 3|] and 3| with adjusting indices and buttons 32 and 33. One end of the rod 30 is pivotally connected by a pin 46' to a plate 34 provided with a groove, in which slides a guide bar 35 with a handle arranged under the table l3, Figs. 3 and 4. One end of the rod 3| is pivoted to a guide 36,, which slides on a slide 31 rigidly fixed on a sliding-carriage 38 at right A--B, the outer end of the arm 29 is carried along in the same direction by the slide 31, the guide 36, and the pin 45' by which the guide 36 and the rod 3| are pivotally connected, and, at the same time, the table I6, which is supported on the table I3, is moved in the same or opposite direction, depending upon the set position of the pivot 46' as determined by the position of the rod 30 lengthwise of the arm 29. In the same way the arm I! is turnable around a rigid plinth 44 on the table I3. The arm I! at its swinging point C is pivoted to the table I3, and the arm 29 at its swinging point at the center of the plinth 43, which is fixed to the base plate I, is pivoted with respect to the base plate I. The pivot 45 and its supporting guide 22 move along a slide 23 which is suspended from the carriage 4 and is moved thereby. The slide 23 is parallel to the line AB and therefore actuates the pivot 45 only in a direction transverse to the direction of movement of carriage8 along bar 5, whereas the pivot 45' is actuated by the carriage 8 along bar 5 only in the direction of movement of the carriage 8 along bar 5, that is, longitudinally in relation to the line AB.

The arm 29 governs the movement of the table I3 in the longitudinal direction of the base plate, by means of which the shoe width is settled. The arm I'I in'a similar way regulates the movement of the table I6 at right angles with the said direction, by means of which the shoe-length is settled. The adjustment of the rod I8 will be clear from Fig. 5, which shows that the distances DD:DC=EE:EC, i. e., the longitudinal difierences of the shoe numbers are proportional to the distances of the graduation markings on the arm II.

In a similar way the rod I9 is adjusted with respect to the scale on the opposite side of the central lin of the arm II, but here the fractional markings have a positive meaning on the left side of the zero mark and a negative one to the right of the zero mark. Thisdepends on the fact that the pivot 46, which moves the plate 26 and the table I6, can be moved on both sides of the swinging-point C (Fig. 5) of the arm. The resultis that the movement of the table I6 in the former case will be added to the movement of the pin I and in the latter case will be subtracted'from it.

The arms I1 and 29 are designed on thesame principles but work in different directions, 1. e., parallel with the symmetry line AB and at right angles with it. The guide bar 28 in the table I6 and the bar 35 in the table I3 are provided in order to be able to give the tables an additional movement in the both main directions and so give the patterns a further increase in length and width, if desired and found suitable.

The machine works in the following way: The rods I8 and 3| are adjusted to the same shoe number, the rods I9 and 30 to the graduation required. A suitable pattern is placed on the,

table I6 and a slab of suitable material is inserted into th holder 41 and is fastened with the screws 48, so that it comes under the cutting apparatus 49, which is operated by means of the pulley 50 and for instance an electric motor. The pin II], which has a constant distance from the cutter I is moved to follow the pattern on the table I6, and the carriage 8 receives the same movement as the pin III. The component of movement of the carriage 8 parallel to the line AB pivots the arm 29, and the component of movement of the carriage 8 at right angles to the line AB pivots the arm IT. The amount of '4 pivotal movement of the arm 29 is determined by the set position of the rod 3| along the arm 29, which position determines the distance between the pin 45' and the pivoted point of the arm 29 about the fixed center of the plinth 43 on the base plate I. The amount of pivotal movement of the arm I1 is determined by the set position of the rod I8 along the arm II, which position determines the distance between the pin 45 and the pivotal point of the arm I'I about the center C on the table I3.

Supposing that the curve :ry in accordance with Fig. 5 is to be copied with a diminution of 5 units or degrees. For each of the coordinate directions this diminution is brought about by the arm system I1, I8 and I9 and by the arm system 29, 92 and 33, respectively. The operation of the machine will be clear from a study of one of these systems, say, I'I, I8 and I9, which brings about adjustments transverse to the direction AB of the base-plate. pin II], which is a constant distance from the cutter 5I, is carried along the edge of the pattern lying on the table I6, say from the point :1: to the point 3 Had the machine been set for no dim-' inution, i. e., the rod I9 adjusted to the zero setting, the moving of the cutter 5| in the directionv perpendicular to AB would have been equal to the distance e. Assuming the rod I9 to be set for a diminution of 5 units in this direction, as

illustrated in Fig. 5, the adjustment has the efiect that the table I6 is moved by the medium of the pivots 45 and 46 in the direction opposite to the direction of movement of the leading-pin I0 as the pin I0 follows the edge of the pattern on' the table. Actually the pin IIJ has'moved along the broken line xv, by which the deflection of the cutter 5I in the direction of the vertical component of movement has been diminished by the distance yv, which represents the diminution required. If instead of diminution an equivalent enlargement is wanted, the index of the rod I9 is adjusted to the scale marking +5, and the table I6 will move in the same direction as the pin III, while the latter follows the edge of the pattern. The deflection of the cutter has then increased by the same distance as in the former case it had diminished. In order to get the diminution or enlargement of the same number of units, for example, 5 units, for the graduating of a large shoe or a small shoe the index of the rod I8 is adjusted to the shoe number in question. As is apparent from Fig. 5, the largest deflection, for example, the deflection for shoe number 585 will lead to the same diminution yv or enlargement as the smallest deflection for shoe number 305. The pivot 46, which regulates the movement of the table I6 in the cross direction (perpendicular to AB) is adjusted by the rod I9 to the dimension change wanted. When no change is desired, the pivot 46 is superposed over the point C, so

that the table I6 remains stationary and in the position shown in Figs. 1 and 2 during the movement of the leading-pin I0. As may be understood from examining Fig. 5, the adjustment of the rod I9 to positive values (enlargements) will lead to the table I6 moving in the same direction as the pin I0, whereas adjustment to negative values (diminutions) will cause the table to: move in the opposite direction. Because the dif- The leadingaces-nee Icla-im: 7

1-.- In a pattern-graduatingmechanism; a fixed base; a first table, means supportingsaid table for movement length-wise of said base, a second table, means carried by said first table for guiding said second table for movement or said sec ond table in the crosswise direction of: Saidbase, a carriage, means mounting said carriage on said base for movement in directions lengthwise and crosswise of said base, a pantographic system for transmitting motion between saidcarriage and said second table, said pantographic system including two pivoted pantographic arms extending laterally to one another in directions substantially crosswise and lengthwise of said base, fespectively', a pivot pivotallysupportingone of said arms with respect to said base, a rdd sl'ideabl yf mounted for movement parallel to said arm, a? pin engaging with said r'od, means attached to s'aid'pin and mounted in sliding relati'oii to said first table for movement laterally to the [direction of movement of said first table, said rod being settable along its associated arm for changing the location of said pin and attached means with respect to S m pivot 61* said one pantographic arm; a second pivot for the second of said pivoted pantographic arms, said second pivot being carried by said first table, a rod slideably mounted for movement parallel to said second pantographic arm, a second pin engaging with said second rod, means attached to said second pin and mounted in sliding relation to said second table for movement laterally to the direction of movement of said second table with respect to said first table, said last-named rod being settable along its associated arm for changing the location of said last-named pin and attached means with respect to said pivot of said second-named pantographic arm; means connecting said first-named pantographic arm with said carriage for transmitting lengthwise movement between said carriage and said first table, and means connecting said second-named pantographic arm with said carriage for transmitting crosswise movement between said carriage and said second table.

2. In a pattern-graduating mechanism, a fixed base, a carriage mounted on said base for movement in directions lengthwise and crosswise of said base at right angles to each other, a pantog raphic arm, a pivot pivotally supporting said pantographic arm on said base, a rod positionable along said pivoted arm, means connecting said carriage and said rod for pivoting said arm in accordance with movement of said carriage lengthwise of said base, a first table slideably guided for movement lengthwise of said base, a plate, means slidably connecting said first table and said plate for relative movement in a direction transverse the lengthwise direction of said base, a second rod positionable alon said pivoted arm, said second-named rod being pivotally connected to said plate; a second pantographic arm pivoted on said first table, a rod positionable along said second pivoted arm, means connecting said carriage and said last-named rod for pivoting said arm in accordance with movement of said carriage crosswise of said base, a second rod positionable along said second pivoted arm, a second plate, said last-named rod being pivotally connected to said second plate, a second table, means mounted on said first table for guiding the movement of said second table relative to said first table in a direction crosswise of said base, means slidably connecting said second table and saidsecond plate for guiding-saidsecondplate" in a direction transverse the crosswise direction of movement of said second table, the rods of each of said pair ofrods on said pivoted arms being settable'a'lon their respective pivoted arms for controlling themovemen-t of said second table with respect to-said carriage lengthwise andcross= wise of said base, 1 I 3. In a pattern-graduating mechanism,- a fixed base, a first table;vmeans for guiding said table for movement lengthwise ofsaid base, a second table; means for guiding said second table for movement "or .saidsecond table relative to said first table in the crosswise direction of said base, acarriage, means mounting said carriage on said base for movement in directions lengthwise and crosswise ofsaid base, a pantographic system for transmitting motion between saidcarriage and said second table, said pantographic system includingztw'o pivoted pantographic arms extending laterally to one another in directionssubstantially crosswise and lengthwise of said base, respective= 1y, a pivot pivotally supporting "one of saidarms with respect to said base,- a second pivot for the second of said pivoted arms, said second pivot being carried by said first table, each of said arms having a pair of slideable rods positionable longitudinally of their respective arms, a pin carried by one rod of said pair of rods on the first of said pivoted arms, means connecting said pin to said carriage to efiect concomitant movement of said carriage and said first of said pivoted arms, a plate, a second pin extending between said plate and the other rod of the pair of rods on the first of said pivoted arms, means for guiding said plate and said second pin for relative movement with respect to said first table laterally to the direction of movement of said first table, said last-named rod and pin being settable for effecting movement of said first table when its associated pantographic arm is pivoted on its pivot; a third pin carried on one of said rods of said pair of rods on the second of said pivotal arms, means connecting said last-named pin to said carriage to efiect concomitant movement of said carriage and said second of said pivoted arms, a second plate, a fourth pin extending between said second plate and the other rod of the second of said pivoted arms, means for guiding said last-named plate and said last-named pin for movement with respect to said second table laterally to the direction of movement of said second table, said lastnamed rod and pin being settable for effecting movement of said second table when its associated pantographic arm is pivoted on its pivot.

4. In a pattern-graduating mechanism, a fixed base, a first table, means for guiding said table for movement lengthwise of said base, a second table, means for guiding said second table for movement of said second table relative to said first table in the crosswise direction of said base, a carriage, means mounting said carriage on said base for movement in directions lengthwise and crosswise of said base, a pivoted pantographic arm having its center of pivot fixed with respect to said base, means connecting said carriage and said pivoted arm for pivoting said arm in accordance with movement of said carriage in said lengthwise direction, an adjustable rod carried by said arm, a plate having a groove extending laterally to the direction of movement of said first table, a guide bar carried by said first table and slidably engaging in said groove, a pivot pin pivotally engaging said plate and rod, said rod and pin being settable for positioning said pivot pin 7 at either side'of said'center of pivot ofsaid pantographic arm for eiiecting desired movement between said carriage and said first table when said pantographic arm is turned about its center of pivot; a second pivoted pantographic arm having its center of pivot attached to said first table, means connecting said carriage and said second pantographic arm for pivoting said arm in accordance with movement of said carriage in said crosswise direction, an adjustable rod carried by Said second pantographic arm, a second plate having a groove extending laterally to the direction of movement of said second table with respect to said first table, a guide bar carried by said second table and slidably engaging said groove of said second plate, another pivot pin pivotally engaging said second plate and said last-named rod, said last-named rod and pin being settable for positionin said last-named pin at either side of said center of pivot of said secondnamed pantographic arm for efiecting desired movement between said carriage and said second table when said second pantographic arm is turned about its center of pivot.

5. The combination set forth in claim 4 in 8. which said guide bars extend from their respective tables to provide manipulative means accessible for adjusting the angular relationship of the respective tables for effecting angular deviations of movement of said tables with respect to the lengthwise and crosswise directions of movement of said carriage.

ALBRECHT PECHER.

- REFERENCES CITED The following references are of record in the file of this patent:

v UNITED STATES PATENTS Number 

